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      1 //===----------------------------------------------------------------------===//
      2 //
      3 //                     The LLVM Compiler Infrastructure
      4 //
      5 // This file is dual licensed under the MIT and the University of Illinois Open
      6 // Source Licenses. See LICENSE.TXT for details.
      7 //
      8 //===----------------------------------------------------------------------===//
      9 //
     10 // UNSUPPORTED: libcpp-has-no-threads
     11 
     12 // <thread>
     13 
     14 // class thread
     15 
     16 // thread(thread&& t);
     17 
     18 #include <thread>
     19 #include <new>
     20 #include <cstdlib>
     21 #include <cassert>
     22 
     23 class G
     24 {
     25     int alive_;
     26 public:
     27     static int n_alive;
     28     static bool op_run;
     29 
     30     G() : alive_(1) {++n_alive;}
     31     G(const G& g) : alive_(g.alive_) {++n_alive;}
     32     ~G() {alive_ = 0; --n_alive;}
     33 
     34     void operator()()
     35     {
     36         assert(alive_ == 1);
     37         assert(n_alive >= 1);
     38         op_run = true;
     39     }
     40 
     41     void operator()(int i, double j)
     42     {
     43         assert(alive_ == 1);
     44         assert(n_alive >= 1);
     45         assert(i == 5);
     46         assert(j == 5.5);
     47         op_run = true;
     48     }
     49 };
     50 
     51 int G::n_alive = 0;
     52 bool G::op_run = false;
     53 
     54 int main()
     55 {
     56 #ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
     57     {
     58         assert(G::n_alive == 0);
     59         assert(!G::op_run);
     60         std::thread t0(G(), 5, 5.5);
     61         std::thread::id id = t0.get_id();
     62         std::thread t1 = std::move(t0);
     63         assert(t1.get_id() == id);
     64         assert(t0.get_id() == std::thread::id());
     65         t1.join();
     66         assert(G::n_alive == 0);
     67         assert(G::op_run);
     68     }
     69 #endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
     70 }
     71